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/*
Copyright Red Hat, Inc. 2017
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 675 Mass Ave, Cambridge,
MA 02139, USA.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <errno.h>
#include <nss.h>
#include <sys/socket.h>
#include <linux/vm_sockets.h>
/* Local includes */
#include "xvm.h"
#include "simple_auth.h"
#include "options.h"
#include "debug.h"
#include "fdops.h"
#include "client.h"
static int
sock_exchange(int fd, fence_auth_type_t auth, void *key,
size_t key_len, int timeout)
{
fd_set rfds;
struct timeval tv;
char ret = 1;
/* Ok, we're connected */
dbg_printf(3, "Issuing challenge\n");
if (sock_challenge(fd, auth, key, key_len, timeout) <= 0) {
/* Challenge failed */
printf("Invalid response to challenge\n");
return 1;
}
/* Now they'll send us one, so we need to respond here */
dbg_printf(3, "Responding to challenge\n");
if (sock_response(fd, auth, key, key_len, timeout) <= 0) {
printf("Invalid response to challenge\n");
return 1;
}
dbg_printf(2, "vsock Exchange + Authentication done... \n");
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
tv.tv_sec = timeout;
tv.tv_usec = 0;
ret = 1;
dbg_printf(3, "Waiting for return value from fence_virtd host\n");
if (_select_retry(fd + 1, &rfds, NULL, NULL, &tv) <= 0)
return -1;
/* Read return code */
if (_read_retry(fd, &ret, 1, &tv) < 0)
ret = 1;
if (ret == (char)RESP_HOSTLIST) /* hostlist */ {
do_read_hostlist(fd, timeout);
ret = 0;
}
return ret;
}
int
vsock_fence_virt(fence_virt_args_t *args)
{
char key[MAX_KEY_LEN];
struct timeval tv;
int key_len = 0, fd = -1;
int ret;
struct sockaddr_vm svm;
fence_req_t freq;
/* Initialize NSS; required to do hashing, as silly as that
sounds... */
if (NSS_NoDB_Init(NULL) != SECSuccess) {
printf("Could not initialize NSS\n");
return 1;
}
if (args->net.auth != AUTH_NONE || args->net.hash != HASH_NONE) {
key_len = read_key_file(args->net.key_file, key, sizeof(key));
if (key_len < 0) {
printf("Could not read %s; trying without "
"authentication\n", args->net.key_file);
args->net.auth = AUTH_NONE;
args->net.hash = HASH_NONE;
key_len = 0;
}
}
/* Same wire protocol as fence_xvm */
memset(&freq, 0, sizeof(freq));
if (args->domain && strlen((char *)args->domain))
strncpy((char *)freq.domain, args->domain, sizeof(freq.domain) - 1);
freq.request = args->op;
freq.hashtype = args->net.hash;
freq.flags = 0;
if (args->flags & F_USE_UUID)
freq.flags |= RF_UUID;
gettimeofday(&tv, NULL);
freq.seqno = (uint32_t) tv.tv_usec;
sign_request(&freq, key, key_len);
fd = socket(PF_VSOCK, SOCK_STREAM, 0);
if (fd < 0) {
printf("Unable to create vsock: %s", strerror(errno));
return 1;
}
memset(&svm, 0, sizeof(svm));
svm.svm_family = AF_VSOCK;
svm.svm_cid = args->net.cid;
svm.svm_port = args->net.port;
if (connect(fd, (struct sockaddr *) &svm, sizeof(svm)) < 0) {
printf("Unable to connect to fence_virtd host %d:%d %s\n",
args->net.cid, args->net.port, strerror(errno));
close(fd);
return 1;
}
ret = _write_retry(fd, &freq, sizeof(freq), NULL);
if (ret != sizeof(freq)) {
perror("write");
close(fd);
return 1;
}
switch (args->net.auth) {
case AUTH_NONE:
case AUTH_SHA1:
case AUTH_SHA256:
case AUTH_SHA512:
ret = sock_exchange(fd, args->net.auth, key, key_len,
args->timeout);
break;
/* case AUTH_X509:
return ssl_exchange(...); */
default:
dbg_printf(3, "Unknown auth type: %d\n", args->net.auth);
ret = 1;
break;
}
close(fd);
return ret;
}
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